#!/bin/sh
#
# Copyright (C) 2022 Free Software Foundation, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#

progname=$0
package=gnulib

# func_usage
# outputs to stdout the --help usage message.
func_usage ()
{
  echo "\
Usage: all-modules [option]

Lists the gnulib-tool command line options that can be used when creating
a testdir of nearly all of gnulib.

Options:

      --for-mingw           list only modules that work on mingw
      --for-msvc            list only modules that work on MSVC

Report bugs to <bug-gnulib@gnu.org>."
}

# func_version
# outputs to stdout the --version message.
func_version ()
{
  func_gnulib_dir
  if test -d "$gnulib_dir"/.git \
     && (git --version) >/dev/null 2>/dev/null \
     && (date --version) >/dev/null 2>/dev/null; then
    # gnulib checked out from git.
    sed_extract_first_date='/^Date/{
s/^Date:[	 ]*//p
q
}'
    date=`cd "$gnulib_dir" && git log ChangeLog | sed -n -e "$sed_extract_first_date"`
    # Turn "Fri Mar 21 07:16:51 2008 -0600" into "Mar 21 2008 07:16:51 -0600".
    sed_year_before_time='s/^[^ ]* \([^ ]*\) \([0-9]*\) \([0-9:]*\) \([0-9]*\) /\1 \2 \4 \3 /'
    date=`echo "$date" | sed -e "$sed_year_before_time"`
    # Use GNU date to compute the time in GMT.
    date=`date -d "$date" -u +"%Y-%m-%d %H:%M:%S"`
    version=' '`cd "$gnulib_dir" && ./build-aux/git-version-gen /dev/null | sed -e 's/-dirty/-modified/'`
  else
    # gnulib copy without versioning information.
    date=`sed -e 's/ .*//;q' "$gnulib_dir"/ChangeLog`
    version=
  fi
  year=`"$gnulib_dir"/build-aux/mdate-sh "$self_abspathname" | sed 's,^.* ,,'`
  echo "\
all-modules (GNU $package $date)$version
Copyright (C) $year Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by" "Bruno Haible"
}

# Excludes for mingw and MSVC.
exclude_for_mingw=
# <pwd.h> and <grp.h> do not exist.
exclude_for_mingw="$exclude_for_mingw idcache"
exclude_for_mingw="$exclude_for_mingw pt_chown grantpt posix_openpt-tests posix_openpt"
exclude_for_mingw="$exclude_for_mingw userspec-tests userspec"
# The functions getuid, getgid, geteuid, getegid don't exist.
exclude_for_mingw="$exclude_for_mingw faccessat"
exclude_for_mingw="$exclude_for_mingw fchownat-tests fchownat chownat"
# The functions fork, setsid, ttyname don't exist.
exclude_for_mingw="$exclude_for_mingw forkpty-tests forkpty login_tty-tests login_tty"

# Excludes for MSVC.
exclude_for_msvc="$exclude_for_mingw"

# Command-line option processing.
exclude=
while test $# -gt 0; do
  case "$1" in
    --for-mingw | --for-ming | --for-min | --for-mi )
      exclude="$exclude $exclude_for_mingw"
      shift ;;
    --for-msvc | --for-msv | --for-ms )
      exclude="$exclude $exclude_for_msvc"
      shift ;;
    --help | --hel | --he | --h )
      func_usage
      exit $? ;;
    --version | --versio | --versi | --vers | --ver | --ve | --v )
      func_version
      exit $? ;;
    -* )
      echo "all-modules: unknown option $1" 1>&2
      echo "Try 'all-modules --help' for more information." 1>&2
      exit 1 ;;
    * )
      echo "all-modules: too many arguments" 1>&2
      echo "Try 'all-modules --help' for more information." 1>&2
      exit 1 ;;
  esac
done

# gnulib-tool --create-testdir collects all modules by default.
# We only need to filter out the excludes.
for m in $exclude; do
  printf '%s\n' "--avoid=$m"
done

# Local Variables:
# indent-tabs-mode: nil
# whitespace-check-buffer-indent: nil
# End:
